XML 38 R25.htm IDEA: XBRL DOCUMENT v3.21.2

Mineral Properties - Guadalupe (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		6 Months Ended	9 Months Ended
	Jun. 30, 2021	Jan. 31, 2021	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Jun. 30, 2020
Property, Plant and Equipment [Line Items]
Mineral properties, Net						$ 2,146		$ 2,146
Deferred option gain						383		$ 68
Gain (Loss) On Disposal Of Mineral Property Interests, Net				$ 3,540		$ 2,100	$ 6,108
Guadalupe De Los Reyes, Mexico | Option Agreement Two
Property, Plant and Equipment [Line Items]
Payments Receivable In Lieu Of Grant Of Royalty And Back-In Rights									$ 2,100
Payments Received In Lieu Of Grant Of Royalty And Back-In Rights	$ 1,000	$ 1,100
Gain (Loss) On Disposal Of Mineral Property Interests, Net			$ 2,100		$ 2,100

X

- Definition

Mineral properties, net of adjustments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 360
-Section 25
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=96866604&loc=d3e64895-109465

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

+ Details

Name:	us-gaap_MineralPropertiesNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Current amount of gain on the sale of property that does not qualify for gain recognition as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	vgz_DeferredGainOnSaleOfPropertyCurrent
Namespace Prefix:	vgz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Gain (Loss) On Disposal Of Mineral Property Interests, Net

+ References

No definition available.

+ Details

Name:	vgz_GainLossOnDisposalOfMineralPropertyInterestsNet
Namespace Prefix:	vgz_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Payments Receivable In Lieu Of Grant Of Royalty And Back-In Rights

+ References

No definition available.

+ Details

Name:	vgz_PaymentsReceivableInLieuOfGrantOfRoyaltyAndBackInRights
Namespace Prefix:	vgz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Payments Received In Lieu Of Grant Of Royalty And Back-In Rights

+ References

No definition available.

+ Details

Name:	vgz_PaymentsReceivedInLieuOfGrantOfRoyaltyAndBackInRights
Namespace Prefix:	vgz_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=vgz_GuadalupeDeLosReyesMexicoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TransactionTypeAxis=vgz_OptionAgreementTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: